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Topic: Arduino GPRS shield caught fire (Read 20488 times) previous topic - next topic

ErikDimitrov

As there are no recent posts on this interesting theme, I have to say that the GSM shield  recently bought, has a zener diode soldered in parallel to the problematic capacitor. So, I think this kinda solve the problem.

toonlumberjack

Would love to see a pic from this new board. Any Specs to the diode?

Best regards

ErikDimitrov

Hi,

sorry for this late response.
Here https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRsx7i6S0QzynAEEK6EIvl_opmtTw4mfAHcTQHte_XGUloDbfUdVQ you could find a photo of this zener diode soldered in parallel of the tantalum cap.
Tonight, when I get back home, I will check again what was the exact number of the diode and will post here it's data sheet.

Regards,

Erik

ErikDimitrov

Hi again!

I am looking now at my GSM shield.
Just to make clear something, this is not a new board, I mean generally. There is just this zener diode added to overcome this design flaw.
Here http://www.futurlec.com/Diodes/1N5338B.shtml, you can check its characteristics.
The diode is 1N5338b.

Regards,

Erik

toonlumberjack

Ahh, this info helps a lot. Would you mind to take a pic from your shield? The pic you posted is so small.

Best regards
toonlumberjack

ErikDimitrov

#50
Mar 24, 2014, 06:50 pm Last Edit: Mar 24, 2014, 08:21 pm by ErikDimitrov Reason: 1
Sure,

an image is attached.  :)

Regards,

Erik

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